Calculating machine



Aug. 24, 1943. c. M. FRIDE'N 2,327,635

CALGULATING'MACHINE Filed July 25, 1938 6 Sheets-Sheet 1 INVENTOR CHRI.M. FRIDEN 8),@173

ATTORNEY Aug. 24, 1943. c. M, FRIDEN 2,327,535

CALCULATING MACHINE Filed July 25, 1938 6 Sheets-Sheet 2 INVENTOR ATTORNEY Tfr-"'15 Q Aug. v24:, 1943. c. M. FRIDEN CALCULATING MACHINEFiled July 25, 1958 6 Sheets-Sheet 5 QFIL@ O 1N VE NTOR CHRI. M F moEN@y X/W ATTORNEY Aug. 24, 1943. c. M. FRIDEN CALCULATING MACHINE FiledJuly 23, 1938 6 Sheets-Sheet 4 W n NAH. mw I@ m www. SZ# T R m N Ll T ,ul a E m ma V M y NQ NQ o o J m m @ou n .Nv Isv n f .S ES wif S ILI.nIMHrHH wm 5 n R Aug- 24, 1943- c. M. FRIDEN CALCULATING MACHINE FiledJuly 23, 1938 6 Sheets-Sheet 5 INVENTOR CHRI. M. FRIDEN -BYQDM W/L.

ATTORNEY Aug. 24, 1943. c, M FRIDEN CALCULATING MACHINE Filed July 23,1938 6 Sheets-Sheet 6 INVENTOR CHRI. M. FRIDEN O /Q/ Nm A TT ORNEYPatented Aug. 24, 1943 CALCULATING MACHINE Carl M. Friden, Oakland,Calif., assignor to Friden Calculating Machine Co., Inc., a corporationof California Application July 23, 1938, Serial No. 220,981

` (c1. zas- 63) 4 Claims.

My invention relates to calculating machines and is concerned moreparticularly with the provision of improved means for resetting theregisters thereof to zero.

It is an object of the invention to provide an improved calculatingmachine in which a shiftable register can be shifted to a selected oneof a plurality of positions and then be restored to zero registration.

Another object of the invention is to provide a calculating machinehaving improved register returnand resetting means, whereby the registercan be shifted to either end position thereof as a preliminary to a zeroresetting operation. 1

Another object of the invention is to provide a calculating machinehaving means for selectively returning a shiftable register to eitherend position thereof.

Other objects of the invention will be apparent from the followingdescription of a preferred embodiment thereof as shown in theaccompanying drawings.

Description of figures Fig. l is a vertical, longitudinal section oftherear part of the machine taken in a plane thru the axis of the actuatingmeans of one order of machine as indicated by the line I-I in Fig. 4.

Fig. 2 is a fragmentary elevational View of the accumulator resettingmeans as indicated by the line 2-2 in Fig, 1.

Fig. 3 is a fragmentary sectional view of the accumulator resettingmeans as indicated by the line 3 3 in Fig. 2.

Fig. 4 is a fragmentary plan view of the actuating means and the driveconnections for the carriage shift and register zero resetting means,with certain parts shown in section. y

Fig. 5 is an elevational view of the rightr side frame plate and theoperating controls mounted thereon as indicated by the line 5-5in Fig.4. The register carriage is shown diagrammatically.

Fig. 6 is a fragmentary sectional View illustrating the clutchconstruction, and is taken asindi.- cated by the line 6-6 in Fig. 4.

7 isa rear elevational View ofthe machine and the carriage taken asindicated by the line 1 1 in Fig. 1.

Fig. 8 is a bottom plan -view of the'right end of the carriage.

Fig. 9 is a perspective view of the full cycle control mechanism of thecarriage shifting means.

Fig. l is a sectional elevation of thecarriage shift and carriage returnand resetting means as indicated by line IU--I 0 in Fig. 4.

Fig. 11 is a fragmentary plan View of the right side of machine with keysections and carriage removed.

.Fig 12 is a rear elevation of the upper part of the machine similar toFig. 7 but with the carriage shown in its opposite end position.

Fig 13 is a fragmentary sectional view of a part of the resettingcontrol means, and is taken in theplane of the line I3-I3 in Fig. 4.

Fig. 14 issimilar to Fig, 13 but shows the parts as conditioned at theend of a resetting operation.

Description of mechanism My invention is disclosed as embodied in acalculating machine having an actuator of the universal operationcontinuous drive cycle type. A complete machine of this type isillustrated in my co-pending application Serial No. 724,482, filed May8, 1934.

Generally, the machine comprises a frame and a carriage mounted forlateral shifting movement on the frame. The carriage mounts theregisters of the machine comprising the accumulator and the revolutionscounter, While the frame provides a support for the various mechanismsfor entering values in the registers. The frame includes base I9(Fig. 1) which supports casing II and has left and right side frameplates I2, I3 (Figs. 1 and 4) mounted thereon. Side plates I2, I3 areconnected by various cross frame brackets I5, Il, I8 and I9 which serveto mount various mechanisms referred to hereinafter. Register carriage22 (Fig. l) is mounted on frame brackets I6 and I9, as by rollers 23,for endwise shifting movement laterally of the machine in eitherdirection to various ordinal positions as controlled by means describedhereinafter.

Accumulator Register carriage 22 (Figs. 1, 7 and 8) includes carriageframe 3| formed by a pair of opposite Ll-shaped members Which aresecured together by suitable fastening means such as screws. Similar endplates 34 (Figs. 7 and 8) are secured to the ends of frame 3I andsupport cross member 36 (Figs. l and 8) in spaced relation from frame3l. The accumulator comprises numeral wheels 4I (Fig. l) secured at theupper ends of numeralwheel shafts 42 journalled in ordinally spacedrelation in carriage frame 3|. The numeral displayed by each wheel 4I(Fig. l) is maintained in alignment with corresponding sight opening 43by suitable ball and gear align- `member 36.

ing and overthrow preventing means 44. To transmit increments of valueto numeral wheels 4|, each shaft d2 extends below carriage frame 3| andhas ten-tooth numeral wheel gear 46 which is actuated by means describedlater.

Accumulator resetting means Means are provided in carriage 22forresetting numeral wheels 4| to zero registration which includes meansfor restoring any displacedv wheels 4| to zero position and means forarresting such wheels positively in zero position. The restoring meansincludes rack bar 5| (Figs. 1Y and 2) mounted for endwise slidingmovement in carriage frame 3| adjacent the uppery ends of numeral wheelshafts 42. The teeth of rack bar 5| (Figs. 2 and 3) are cut away at 52alternately at the top and bottom to form a plurality of separate racksfor cooperation with mutilated gears 53 on numeral wheel shafts 42.Adjacent gears 53 are axially offset to cooperate with the adjacentvertically offset racks formed on rack' bar 5| by cut away portions 52thereof.

When rack bar 5| (Figs. 1 3) is in normal inactive position, gears 53register with cut away portions 52 so that numeral wheels 4| can beactuated without interference. If rack barV 5| is moved tofthe` right asviewed in Fig. 2, the unmutilated parts ofV gears 53 of any numeralwheels 4| displaced from zero position will' be engaged by theassociated racks on bar 5|` and such displaced numeral. wheels 4!areturned until restoredv to zero position. In this connection it willbe noted that any numeral wheels 4| in zero position will not be movedby rack bar 5| because the mutilated portions of gears 53 ci suchnumeral wheels face the rack bar. For manual operation rack bar 5|provided with handle 5S (Fig. 7) by means of which bar 5| can ybeactuated.. against. the tension of a suitable springr (not shown) whichnormally maintains bar 5|. in inactive position.

The movement of bar 5| to the right as viewed in Fig. 2 to restore anydisplacednumeral wheels 6| to Zero position also enables the means forarrestingY wheels 4 in such position. Stop slide 6| (Figs. l and 3) ismounted for limited endwise movement on` top of carriage frame 3| bysuitable pin and slot connections, and is provided with a stopprojection E?. (Fig. 3) for each numeral wheel 4|. Each numeral wheelshaft 42 has a stop tooth 63 secured thereon for cooperation withprojections 52, in the Zero position of numeral wheels di.

Zero registration manually bynianipulation of handle 5S. The poweroperation of theresetting or zeroizingl means is described hereinafter.'

Revolutions coun-tet1 and resetting' means therefor The yrevolutionscounter which ig also carried bycarriage 2.2 comprises numeral wheels1|' (Figs. 1 and 8") on respective shafts which arev journalled incarriage fra-me member 3|? and cross A numeral Wheel 'N is provided foreach ordinal position of thecarriage, and the displayed numeral ofA eachwheel'- 'H (Fig. 1)# i-s Slide 6| is held normally in` Y inactiveposition by suitable spring means Ell (Fig. 12) to each projection 32isv out ofthe path CII maintained in alignment with the associated sightopening i3 by ball and gear means lll.

Means are provided for resetting numeral wheel 'H (Figs. 1 and 8) of thecounting register to zero, which is similar in construction andoperation to that described in connection with accumulator wheels 4|,and may include manually operable rack bar I5 and stop slide 'i6suitably mounted in the carriage for cooperation with mutilated gearsll, and stop teeth 1'8 on shafts 12. If desired, the rack bar I5 may becoupled to the bar 5| of the accumulator as shown in my tao-pendingapplication Serial No. 42,268, lecl lSeptember 26, 1935.

From: the foregoing description, it is seen that they shitable registercarriage provides a mounting for both the accumulator and revolutionscounter, which are, therefore, shiitable with respect to the actuatingmeans therefor which are mounted in the frame of the machine. Also,each. register is provided with zeroizing means shiftable with. thecarriage. The actuating means and the associated driving and valueselecting mechanism for the registers will now be described briefly asthey are generally similar to those described in said application.

Selecting and actuating mechanisms The values to be introduced intoaccumui'ator numeral wheelslll are selected by means of' a pluralityofbanks or orders of settabl'e value keys flf, one of' which banks isillustratedv in part in Fig. 1'.' vEach bank of keys mi cooperates withselecting mechanism including a' pair of parallel spring-urgedslidjesilgrnountedf'or endwise movement to positionY gears |53y selectivelywith respect to stepped teetlr fc4 ofthe associated actuating cylinder|36 in accordance with the value oi the depressed key. One gear |03 ofeach'ordi'nal pair and the associated slide |102' cooperate with valuekeys #0| from l to' 5. and the left hand set of teeth' HM on theassociated cylinder me asaviewed in Fig. 1, while the other gear |03 andslide M32 cooperate with value keysA ||l| from "6 to "9 and the righthand set of teeth |54 on such cylinder.

Cylinders it (Figs. v1 and 4:) are mounted on actuating shaftsl lillhaving sui-table bevel gear connections with transverse-l shaft |33whichis suitably journalled in side plates |2, i3. Each shaft fillserves for two orders of the machine and has a pair of cylinders |96mounted thereon. Shaft |98 and shafts- Hll. are driven cyclically frommotor 'H39 (Fig.- I.) thrul clutch (Fi-gs. 4 and 6) which is driven bysuitable gearing H2 from motor shaft H3. As explained. in said.copending application, clutch l is engaged or disengaged by oscillationof spring-urged clutch pawl or dog H4 (Fig. 6`) mounted for Arotationwith shaft |03 and with respect to. driving ratchet |B, which isjournalled` on shaft |613 and driven by gearing H2. p Clutch controllever pivoted on side plate |3 determines engagement orY disengagementci the clutch by releasing or engaging the' nose of dog. H'i in the fullcycle position thereof.

From the above description, it is seen that the values set in themachine` by depression of keys HH will be entered in numeral wheels dibythe cooperation of gears |03 with teeth Iili'y of cylinders F55'during cyclic' operation of the clutch. Each pair of gears |63 isslidably mounted on a 'square' shaft l2| (Fig. l) supported in crossframe brackets f1, E8 and extending rearwardly of the machine thru crossmember Il andhav'ing its rear endl journalledin cross:l frame bracketit.

Intermediate brackets I6, l1, a spool |22 is slidably and non-rotatablymounted on each shaft |2| and has opposite bevel gears |23, |24 at itsends positioned for cooperation with numeral wheel gear 46. Therefore,when one or the other set of gears |23, |24 is engaged with gears 46,numeral wheels 4| will be rotated forwardly or reversely to register anumber of increments equal to the value of the depressed keys in thealigned bank of keys.

To control the engagement of gears |23, |24 (Fig. 1) with gears 46,strap |25 is positioned between gears |23, |24 and is mounted bysuitable arms for rocking movement with shaft I 26. Thus, by rockingshaft |26 either set of gears |23, |24 can be moved on shafts I 2| bystrap |25 from the position shown in Fig. l into engagement with gears46. Gears |23 transmit positive increments land gears |24 transmitnegative increments. Any suitable control means can be provided forcontrolling the position of shaft |26 and gears |23, |24 and forsimultaneously enabling the drive through clutch I, as for example, theplus and minus keys of the character disclosed in said application.

Suitable spring-urged centralizing means are provided for maintainingshaft |26, strap and gears |23, |24 in their central neutral position.Such means may comprise opposed centralizing arms |21 (Fig. 1) havingrespective pivotal supports |28 on side plate I2 and interconnected byspring |29 so as to be urged 'against stop |30 on plate I2. The upperends of centralizing arms |21 are bent inwardly for co-operativeengagement with pin |3| carried by one of arms |29, so that arms |21yieldably resist movement of gears I 23 and |24 from their neutralposition, and serve to return them thereto after a calculatingoperation.

Transferred increments in the accumulator are entered through gears |23,24 (Fig. 1) by means of trip levers |32 (Figs. 1 and 8), transferactuators |33 on shafts |01 and gears |34 on shafts |2| in aconventional manner as fully disclosed in said application Serial No.724,482.

The number of actuations of accumulator numeral wheels 4| are registeredeither positively or negatively in counting numeral wheels 1| byactuator |36 (Fig. 1) which is driven and cperated in a manner fullydescribed in said application to enter single increments in the activeorder of the revolutions counter and to carry from order to order inhigher orders thereof.

Carriage shifting mechanismr Means are provided for shifting thecarriage in either direction from one ordinal position to anothermanually by releasing the carriage for free shifting movement and alsoby power driven means controlled by manually operable keys.

referably, the power driven means is driven from the clutch through theactuating means for en tering values into the accumulator, and theclutch is disengaged automatically when the carriage has been shifted toeither end position thereof.

Carriage 22 (Figs. '7 and 8) has plate |5| mounted along the rear sidethereof by means of adjusting screws |52 threaded in brackets |53 oncarriage frame 3| and having smooth ends pivotally engaged withlaterally projecting end portions |54 of plate |5|. Plate |5| hasvertical slots |51 formed in the lower edge thereof by teeth |58, slots|51 being spaced apart a distance equal to the ordinal spacing of themachine and aligned with drive shafts |2I. Slots E |51 are adapted forengagement by opposite shift pins |6| (Figs. 4 and 7) on shift gear |62,which is journalled on frame bracket |6 and is rotated by meansdescribed later to effect sluiting of the carriage. One half revolutionof gear |62 eiects one ordinal spacing of carriage 22 and to provide foraccurate centering of the carriage at the end of a shift,centralizingcam |63, is mounted for rotation with gear |62. Centralizingarms I 54 suitably pivoted at one end on frame member I6 having suitablerollers at their opposite ends engaging opposite sides of cam |63 underthe influence of spring |65 tensioned between arms |64. When pins I 6|are in horizontal alignment the carriage is l properly positioned andthe centralizing rollers are seated in opposite depressions formedbetween the high portions of cam |63.

The manual release of the carriage for free shifting movement iseffected by rocking plate |5| out of engagement with pins EI of shiftgear |62. Plate |5| is maintained resiliently in cperative position byspring |66 (Fig. 8) tensioned between carriage frame 3| and endextension |61 of plate |5|. Carriage release handle |68 (Fig. 7) isjournalled on carriage end plate 34'. in axial alignment with screws 52forming the pivotal axis for plate |5I, and has its inner: end rigidlybut removably connected to the bent end of extension |61 of plate |5I.Thus by turning handle |68, plate |5| can be moved out of engagementwith pins IGI to permit free shifting movement of the carriage.

Resilient bumper means is provided for pre Venting shifting of thecarriage beyond its end positions, to one of which it is usuallyreturned to begin a calculation. Bumper lever 1| (Fig. 7) is pivoted at12 on frame bracket I6 and has its upper end positioned for engagementwith the head of adjusting screw |52 when the carriage is in its leftend position, (to the right as viewed in Fig. ',7) and with stop lug |13(Fig. 12) when in its other end position. The lower end of lever I1! isnotched for engagement by the nose of spring-urged centering arm |14which maintains bumper lever |1| resiliently in the position shown. Themovement of lever when struck by screw |52 is limited by the engagementof abutment |16 thereof with the top of left side frame plate |2, andwhen struck by lug |13, by the engagement of its lower end with sideplate I2.

Yieldable means are provided to prevent attempted shifting of theregister carriage beyond the lowest and highest ordinal positionsthereof during power operation of the shifting means. End slots |51 areformed in part bv end teeth |52 and in part by respective pawls |84,|82. Pawls |8I. |82 are pivcted at |83, |84, respectively on plate |5|and extend inwardly to position. the straight end edges thereof oppositeend teeth |58 to form end slots |51. Pawls IBl, |82 are held resilientlythe position shown against stop pins by respective springs |86, |81associated therewith. 'When carriage 22 is in the end position shown inFig. 7, one pin 6| lies in an end slot |51 and the other is positionedbeneath adjacent pawl |82 in engagement with a cam edge thereof. In thiscondition ro tation of shift gear |62 and pins I6! in a direction tomove the carriage beyond the end position merely results in oscillatingpawl |62. However, upon. rotation of gear |62 in a direction to effectcarriage shifting to an intermediate ordinal position, the end edge ofpawl |82 positively resists the' pin ttl in end slot E57: and carriageshifting results. A similar action occurs if the carriage is in itsother endl position to place shift gear adjacent pawl ll' as shown inFig, l2. It. is seen, therefore, that the carriage cannot be shiftedbeyond' either end position thereofby operation of shift gear 52. Theoscillations of pawls ibik and 82 are used in a' manner describedhereinafter to control stopping of the mach-ine in carriage shiftingoperations after the carriage has entered an end position.

As stated above, shift gear E62 is rotatable in either direction byselectively operable drive connections with the actuating means of themachine. For this purpose, the two lowest der actuating shaftsv ll (Fig,4) are extended rearwardly and have respective collars fill securedadjacent the ends thereof. Each collar 22 is provided with oppositeslots slidably engaged by corresponding teeth 2&2 of a shifta.le driveestablishing collar 223 mounted freely on the end of shaft lill.Opposite teeth thereof, each collar 223 has smaller teeth 2nd adaptedfor engagement with corresponding slots respective gear sleeves 2M, 2m',which are journalled in frame bracket 55 and small plate mounted onmember i6 b'y suitable spacers and fastening screws. Gear sleeve 252(Figs. 4 7) has gear2l l meshing with idler gear 2l2 (Fig. 7) journalledin bracket i5 and plate and meshing with shift gear i221 Gear sleeve22'? (Figs. 4 and '1) has gear 2i3 (Fig, 7) offset axially from idlergear 2I2 and meshing with wide reverse idler Agear 2id suitablyrjournalled in bracket it and plate 202 and also meshing with idler gear2i2. Thus, rotation of gear sleeve 2&5 in a clockwise direction asviewed in Fig. 7 causes clockwise' rotation of shift gear 162 andshifting of carriage 22 to the left as viewed from the front of themachine. Correspondingly, rotation of gear sleeve Elli' in a clockwisedirection as viewed in Fig. 7 effects counter-clockwise rotation ofshift gear i552 and shifting of carriage 22 to the right as viewed fromthe front of the machine. Thus, by selective establishing of driveconnections betwee gear sleeves 2%. Zil'l (Fig` 4) and collars 255i uponselective shifting of respective shiftable collars 2533.3, carriage 2?.can be shifted in either direction.. The gear ratios are so chosen thatone rotation of actuating shafts lill effects onehalf rotation of shiftgear |52.

Manually operable control means are provided for the carriage shiftingmechanism described above to enable selective shifting of the carriagein either direction through one or more ordinal spaces. Shift keys 22l,222 (Figs. 5 and 10) are depressible to initiate shifting of thecarriage to the right and left respectively as viewed from the front ofthe machine. Depression of either key serves to enable a driveconnection from the actuating means to the carriage shifting mechanisrnduring the first part of its downward movement and thereafter to engagethe clutch energize the motor. Keys 22E, 222 (Fig. 5) are mounted forendwise movement by suitable longitudinal slots formed therein andengaged by a plurality of studs 223 secured on frame plate i3, Keys 224,222 have adjacent ears 226 with respective studs 22?, 223 mountedtherein and extending to either side thereof. To maintain the shift keysresiliently in raised position, coil spring 23! (Fig. 10) is providedhaving its ends fastened to side plate I3 and passing over upper orystuds 223 and under they ends of studsA 227,. 228 which extend throughsuitable slots in side plate i3.

To enable the drive connection from the actuating means to the carriageshifting mechanisrn upon depression of shift key 22|', stud 221 (Fig.10) engages the upper end of arm 232 secured on sleeve 233 (Figs. 4 and10). Sleeve 233 is journalled on transverse shaft 234 which is suitablyjournalled at its ends in side plate i3 and bracket 235 on cross bracketES. At its left end, sleeve 233 is provided with depending arm 231 (Fig.l0) having its rounded end in engagement with the front end ofrearwardly extending rod 232 (Figs. 4 and 10). Rod 238 is mounted forsliding movement in cross brackets Il, E3 and is resiliently urged toits forward position by spring 239 compressed Vbetween cross member i8and a suitable washer on rod 238. At its rear end, rod 232 (Fig. 4) hasshift fork 2li! Vsecured thereon with its forked end in engagement withan annular groove in right-hand shiftable collar 2&13. From theforegoing description, it is seen that depression of key 22! iseffective through stud 22l to rock arm 232, sleeve 233 and arm 23"! tomove rod 238 rearwardly. Such rearward movement of rod 238 is effectivethrough shift fork to engage teeth 2G55 of right-hand shift collar 263with corresponding slots in gear sleeve 227. Thus, initial depression ofshift key 2.2i is effected to enable a drive connection from theactuating means to the carriage shifting mechanism, and to determineshifting of the carriage to the right.

nection to determine shifting of the carriage to the left. Stud 223(Fig. 10) is engaged with the upper end of arm 245 having its hubsecured on shaft 2312 At its left end, shaft 23d (Fig 4) has dependingarm 2li-'i (similar to arm 237i) secured thereon in operative relationwith shift rod 248 having shift fork 24@ at its rear end in engagementwith an annular groove in left-hand shift collar 223. It is seen,therefore, that depression of key 222 results in rocking of shaft 224and rearward movement of rod ZES to engage lefthand shift collar 223with gear sleeve 226. This conditions the carriage shift mechanism forshifting of the carriage to the left. It is to be noted that only asmall amount of movement is required to engage teeth 2M with thecorresponding slots in gear sleeves 226, 227 so that the driveconnection is enabled during the first part of the downward movement ofkeys 22l,7222.

The latter part of the downward movement of keys 223, 222 is utilized toengage the clutch and energize the motor. Studs 22?, 22S (Fig. 5)overlie respective cam surfaces at the upper end of lever 255. Lever 25!is adjustably secured on lever 252 by pivot 253 and vby pin and slotconnection 25d having suitable clamping meansV for maintaining therelative adjustment between levers 25E, 252. From the relation of studs22'51, 228 and lever 25, it is evident that depression of either of keys22H, 222 is effective during the latter part of the movement to rocklevers 2Min a clockwise direction.. Lever 252 is connected at its upperend'Y by link 252 with clutch contr-ol lever El? (Figs. 5 and 6) so thatmovement of link 255 will result upon depression of either of the shiftkeys. Such movement is effective in the manner previously described toengage the clutch. The motor is energized uponr oscillation of lever 252(Fig. 5) which has a pin and .fracasos slot connection with lever 251having pin 258 mounted adjacent contacts 259 of the motor circuit. Lever25| also provides an interlock between shift keys 22|, 222 by means oflock portions 26|, 262 which are adapted to move beneath studs 221, 228respectively. For example, if key 22| is depressed, lock portion 262moves into blocking position beneath stud 228.

Means are provided for maintaining the drive connection from theactuating means to the carriage shifting mechanism throughout each cycleof movement even though the depressed shift key be released immediatelyafter depression thereof and before complete shifting of the carriage.For this purpose each shiftable collar 203 is provided with a similarmechanism, only one of which will be described. Right-hand shiftablecollar 203 (Figs. 4, 7 and 9) is provided with disc 21| having a cutaway portion 212 which, in the full cycle position of collar 203, is inthe position illustrated in Fig. 7. Immediately to the rear of disc 21locking element 213 is provided mounted in bracket 214 for movementradially of collar 203, and urged to its extended position by spring216. With shiftable collar 203 in its inactive position disc 21| ispositioned forwardly of locking element 213 and when moved rearwardly ofthe machine to its active position passes by element 213 which is inalignment with the cut away portion 212. Upon subsequent rotation ofdisc 21| the solid portion thereof engages element 213 and preventsmovement of collar 203 forwardly of the machine so that teeth 202 aremaintained in engagement with gear sleeve 201 for one or more completerevolutions or cycles irrespective of release of the associated shiftkey before the end of a cycle. Left hand shiftable collar 203 is held indrive establishing position for each cycle of rotation by similarmechanism.

From the foregoing description it is seen that keys 22|, 222 and theassociated mechanism provide means for shifting the carriage selectivelyin either direction from one ordinal position of the carriage toanother. If a shift key be maintained in depressed position, shiftingwill continue until the carriage reaches an end position, when, aspreviously described, continued operation of the shifting mechanism inthe same direction becomes ineffective, and means is brought into playto disengage the clutch and stop operation of the shift mechanismirrespective of release of the depressed shift key by the operator.

For this purpose, clutch control link 256 (Figs. and 11) has pivotedconnection 28| with lever 252 at one end and adjacent its other rearwardend is notched at 282 for detachable engagement with pin 283 on clutchcontrol lever |I1, the connection therebetween being maintained byspring 284. The rearward end of link 256 is bent to provide lateralextension 286 which lies under the hooked arm of bellcrank 281 pivotedby stud 288 on plate I3. The depending arm of bellcrank 281 is pivotallyconnected to link 289, which extends rearwardly for pivotal connectionby pin 290 with the upright arm of bellcrank 29| pivoted at 292 on plateI3. The horizontal arm of bellcrank 29| is forked to engage pin 293 onslide 294 mounted for endwise sliding movement on studs 295 projectingoutwardly from plate |3. Slide 294 is urged to its upperpositlon byspring 296 tensioned between pin 293 and upper stud 295, spring 296 alsobeing effective through bellcrank 29| and link 289 to urge bellcrank 281in a clockwise direction. From the above-described relation of theparts, it will be seen that downward movement of slide 294 is eectivethrough bellcrank 281 to move the rearward end of link 256 downwardly todisengage notch 282 from pin 283 and release clutch control lever ||1for movement to clutch disengaging position.

The clutch controlling movement of slide 294 is effected in either endposition of the carriage by means operated by the shift gear during thenrst cycle of movement thereof with the carriage in an end position. Toeffect this control with the carriage in the end position thereof shownin Fig. 7, pawl |82 is provided with cam arm 291 which in the endposition 0f the carriage -overlies the bevelled upper end oi' slide 294so as to move the slide downwardly when pawl |82 is oscillated by a pinIBI of shift gear |62 during the nrst cycle of movement with thecarriage in the end position shown.

To effect the clutch disengaging control with the carriage in the endposition shown in Fig. 12, lever 298 is pivoted at 299 ou one or rackteeth |58 with one end thereof held in operative engagement with pin 30|of pawl |8| by spring |86. Lever 298 is provided with cam arm 302overlying the upper end of slide 294 in the carriage position shown inFig. 12, and is operated through pawl |8| from shift gear |62 to effectdisengagement of the clutch in the same manner.

Thus, in either end position of the carriage, the drive for the shiftingmechanism is disabled after one cycle of operation if the selected drivedirection will determine shifting beyond the end position. The mechanismfor disengaging the drive as described does not form a part of thisinvention but is disclosed and claimed in the co-pending application or^John L. Moody, Serial No. 220,982, led, July 23, 1938. This control isalso utilized in the operation of the normalizing mechanism foreffecting return of the carriage to an end position` and subsequent zeroresetting of the accumulator.

Normal-zing mechanism Means are provided for restoring the machine tonormal condition between successive operations, and the restoring may beeffected by returning the carriage to either end position and byresetting the accumulator to zero after its return to either oi' suchpositions, in accordance with the type of calculation which is tofollow. The normalizing mechanism includes, selective control means inthe form of keys 3| 0 and 3| (Fig. 5) for controlling the return of thecarriage to the selected end position and a subsequent zeroizingoperation, after which the mechanism stops irrespective of whether ornot the depressed key is held in this position.

Either oi return and resetting keys H0 or SII (Fig. 5) is operative upondepression thereofl to establish a drive connection between the powerdriven resetting mechanism and the actuating means and to initiate acarriage shirting operation. The depressed key is latched in depressedposition until trie carriage return and resetting operation are eiectedwhen the latch is automatically released and the drive interrupted.

Keys 3|@ and 3| are mounted for endwise movement on side plate I3adjacent shift keys 22| and 222,'respectiveiy, and for this pur-pose,each or keys 3|0 and 3|| is slotted for engagement by spaced apart studs3|2 on plate |3, and are urged to their raised position by virtue or'respective projections 313, and 3|4 thereon overlying teeth 3|5 and 3|6on shift keys 22| and 222, respectively. By virtue of the overlappingrelation of f stud 352 associated With key 3&8.

l(Figs. `5 and 13) tensione'd between a pin on side movement on platei3, being slotted .intermediate its ends for engagement with stud 32.3

and at its front end for engagement with( lower Spring .325

platev i3 and 'pin 32? at the rear end of slide 322 urges slide 322 toactive position so that .upon Ydepression of either of keys SH3 or VEli, slide .322 Will become eiective and maintain the .key in depressedposition until it is released by means described hereinafter.

l As stated above, depression of either cf keys Sill or '3H enables adrive connection from the actuating means tozero resetting drive means.The zero resetting drive member comprises slide '33! (Figs. 4 and 7)mounted for endwise`-movement on framebracket I6 by brackets 332. Slidehas vertical projection 335 terminating `in lateral extension 33d whichcomprises theactive part of actuating slide (331, and is adapted foroperative relation with either of two drive .-receiving arms carried byresetting "bar 5l cf the accumulator zero resetting means.

When carriage 22 lis in its left end position as illustrated in Fig. 7Where it is returned byoperfation of .key 3H, extension 33t is inoperative relation With arm 3,35 pivoted at 331 (Fig. 7) on resettingbar El for numeral Wheels ,di of .the accumulator..V Arm 336 has livepawl 33S pivoted thereon intermediate its ends and fur-ged against pin339by spring 3d@ tensioned between pavvl 338 and agsuitable lug or bar51E. Pavvl 338 is adapted to cooperate With fixed ledge .Sdi mounted onframe bracket It to 'maintain 'arm S36 raised to a lposition out 'of the`path yof 'slide extension v'334i until the carriage is shiitediinto'its left end position, `or until arm tt'isfout `vof the 'range ofmovement-of slide 'extension 3st, Spring 5320 also `urges arm `336 'to'the position shown with pin 342 'engaged with'asurface of carriageframe EL With 'the parts positioned as illustratedinig. '7, it is seenthatuponmove-- ment of slide '33t to the left, Ylateral extension 331iwill engage the end'of arm yt3it'toreci'pro'cate resetting 'rack'bar'land eiect'resetting "ofthe accumulator Wheels il lin the mannerpreviously described.

When carriage-22 is in its right'end position as illustrated-in Fig. 12Where it is Areturnediby operation of -key Sityextension 33d visinoperativelrelationv-with'arm d'pivoted at 3M. onv resetting bar 5ian'durged in a clockwise direction by springdlb. -Atit-s outer end arm343 carries rollertli operatively en-gagedwith lever iM-pivoted at SL33oncarriageframel and having cam nose .3de intermediate -its ends lforcooperation With xed ledge 3.5i) .on `frame bracketi 6 tomaintainarmtll. raised'to .a position out of the path of slide extension 33duntil the.Carriageisshited into its right end position, or until armd{is moved out of the range of movement ofslide extension 33H.

The means for actuating slide 33! (Figq'D includes arm Slpvoted at 352onplatel'and. having a slot at its upper end engaged by'pin 353 on.slide $53!. Intermediate its ends, arm 35i has .roller 35d journalledthereon for cooperation with cam 35.5 `under the influence of spring35i. Cam 35S (Fig. 4) has hub 358 Journalled -in .bracket l@ .and insmall plate 36| mounted in ,spaced relation from bracket l5 by suitable.spacers and studs. AHub 353 Aof lcam -end thereof.' Shiftable collar36d, therefore, provides means .for establishing va drive connectionfrom the actuating means to the .Zero .resetting drive member. Collar-354jhas anannular groove lto receive control .fork .37H .mounted at.the rear end of rod if-i2 which is .supported .for iendwise slidingmovement .in .cross brackets l', iii. 32 is spring-urged to its forward.position .by spring 3713 in the same .manner as rod and spring 239 vofthe `carriage shifting mechanism. The v.front end vof rod .372 isnormally lengaged With the lower end surface l.of arm tti (Figs. 1 and4) .secured .on shaft .31.5 which is niej/.ably supported in side`plates I2, I3.' Arm SM1-Fig. l) has an upper end surface `of greater.radius so that clockwise movementbf =arm .3i-fl, as `viewed in Fig. l,.causes .endwisermovement'oi rod until-itis engaged Withfthe yendsurfaoeof greater radius. Shaft 31.5 .(Figs. .4, r5 and 10.) .carriesbellcrank y3.|t,.having pin-3l? onhne arm .thereof disposed below the`lovver end ofkey 3H, .and having-pin on the other arm-thereoioperatively vengaged with .the 'forkedend of arrntl'pivotally-connectedto the lowerend vof key-.3m Spring Stil connected to.bellcrank .31e kholds itin operative engagement vvi'thkeys 3i@ and 3H.lt is seen, therefore, that ydepression ofeithenof return and.resetkeysland 3M serves, .by rock ing shaftst and-arm 3M, Vto .engage,teeth .36.3 (Figff) ofshiftableollar 36d with notches-.362

' or @am .heb .ses .thereby .enabling .the drive-.Gen

nection from theactuating means itothe 'zero resetting drive-mernber.fAs the'depressed .resetting -key ds latched in depressed .position,.such drive connection will remain :enabled until release of the [latch:so .thatzthe-,carriage .isn'eturned to the end ,position .correspondingtto Lthe :'depressed key, if displaeedztherefrom,niidithenext revolutionLof .the :actuating mean-s '.eectivev .to resettheiacclunulatorztozero-and to releaseithe latch .for the vdepressedkey.

7) fof pavvl I 82 'and cam; arm-:Stil 112) o'flever 2981arelcooperatiwalyrelatedinthe respective-end positions of the vcarriage-with cam surface '38S' (FigsAJW, 171 and 513) oflatchreleasing-'slide2357 Whichismounted forA endwisemovementby studs295 ons'ide `plate IF3, 'so-that slide ttl Will'be actuated lthereby"inthe same'manner 'as clutch disengaging 'slide"2"s', andat theIsametiine, i. e. during the cycle of operation .during which .the

zero'resetting Yof .the accumulator occurs. "Latch releasing s1i'de`331'(EigllS) carries .pin 318B .which is engaged .'.by the "fo'rke'dend'hf.bellcrank .3.3.9 pivoted .by-stud .129.2 on side plate .I3 y.and havingits other .end connected-byfpin-BZT .tolatch-slide 322, -so .tha-t.-spring $.26 urges slide 'lrto its upper position. Thus, .when slidedis'ractuated :by

152),-.bellcrank89 Fi-g. 13) moves ;latch slide 322 (Figs. 13 and 5)rearwardly to release depressed resetting key.

Means is provided to prevent latching a resetting key in depressedposition when the carriage is in either one of its end positions so thatif the operator maintains a key depressed after oompletion of theresetting operation it will be free to move to its raised position, andso that the connection for controlling engagement of the clutch can bere-established. Latch bellcrank 39| (Figs. 11 and 13) is pivoted onupper stud 295 between slides 294 and 381 and has ear 392 connected byspring 393 with pin 383 on slide 381 so that it is urged in a clockwisedirection, spring 393 also urging slide 381 upwardly. The depending armof bellcrank 39| (Fig. 13) is notched to provide latching shoulder 394for operative engagement with laterally projecting latch tooth 395 ofslide 361 in the depressed position thereof shown in Fig. 14. Thehorizontal arm of bellcrank 39| is provided with laterally projectingear 396 which rides against the bottom face of carriage frame 3|' at therear edge thereof so that bellcrank 39i is held inactive except in theend positions of the carriage where one of respective recesses 391(Figs. 5, 7 and 8) and 393 (Fig. 12) is aligned therewith. As shown inFig. 14, when recess 391 is aligned with latch bellcrank 39|, whichcondition will obtain at the end of each resetting operation controlledby key 3| l bellcrank 39| will move into active position to maintainslide 381 depressed, so that latch slide 322 (Fig. will be held ininactive position with respect to keys 3|9 and 3|l. Upon subsequentdisplacement of the carriage from an end position, bellcrank 39| will bemoved to inactive position so that latch releasing slide 381 and latchslide 322 will be returned to their normal positions shown in Figs. 5and 13.

the

Operation The operation of the normalizing mechanism will be describedin connection with depression of the key 3|9 (Fig. 5) which also causesdepression of key 22| to operate the shifting mechanism. Depression ofkey 22| (Figs. 10 and 11) serves thru arm 232 to rock sleeve 234 and arm231 depending therefrom, so that rod 233` (Fig. 4) is moved rearwardlyto engage right hand co1- lar 203 with sleeve 201 to enable the drive toshift gear |62.

After the drive connection to the shift gear is established furtherdepression of key 22| (Fig. 5) serves thru levers 25| and 252 to closethe motor circuit by engaging contacts 259 and to engage the clutch thrulink 256 which rocks clutch control lever ||1 (Figs. 5 and 6) in adirection to release clutch pawl H4.

The machine begins to turn over and shift gear |62 is rotated in acounter-clockwise direction as viewed in Fig. 12 until the carriageenters the end position illustrated.

Key 3|9 is connected by link 319 with bellcrank 31S so as to causeoscillation of shaft 315 (Figs. 1 and 4) which operates thru cam arm-314to move control rod 312 rearwardly so thatre setting collar 364 is movedinto driving engagement with nut 35s of resetting @am 356 (Figa).

Consequently, during the operation of the sluit,- ing mechanism cam 356serves thru arm 35|.'f0`

reciprocate actuating slide 33| once for each cycle` r` Thus, when thecarriage enters of operation. the position shown in Fig. 12 its arm 343isfaer'- mitted to move into the ating tooth 334, rack bar si will beescalated@ to reset the accumulator to zero registration. The arm 343 isallowed to drop as the carriage finishes its last step of shiftingmovement by arm 341 whose cam tooth 319 rides off of ledge 359 at thistime.

As a result, actuating slide 33| performs a resetting operation duringthe first cycle of the actuating means following the shift cycle whichplaced the carriage in its end position. During this cycle of operationpawl 13| (Fig. 12) is oscillated to correspondingly oscillate pawl 298so that its arm 362 moves slide 294 downwardly against the tension ofits spring 29S and serves to oscillate bellcrank 29| in a clockwisedirection. Such movement of bellcrank 29| operates thru link 289 to rockbellcrank 281 in a counter-clockwise direction so that link 256 is moveddownwardly to disengage the notch 282 from pin 253 on clutch controllever H1. Thus, lever H1 is free to move into the path of clutch pawl|14 and move this paWl to clutch disengaging position at the end of thecycle of operation then in progress to interrupt the drive even thoughthe key 313 be maintained in depressed position. Subsequently, when keys3 I0 and 22| are released, link 259 (Fig. 5) moves upwardly under theinfluence of its spring 289 to re-engage its notch 292 with pin 233 sothat the parts are reconditioned for subsequent operation.

Arm 392 of pawl 298 is also effective with respect to latch disablingslide 231 (Figs. 12 and i3) which operates thru bellcrank 389 to movelatch slide 322 rearwardly of the machine to remove pin 3|9 from itslatching engagement with tooth 3|1 on key 3|3.

At the same time that slide 331 is moved downwardly iatching bellcrank391 moves from the position shown in Fig. 13 to that shown in Fig. 14,so that slide 331 and its associated latching slide 322 cannot again bemoved to operative position until the carriage is shifted out of its endposition where recess 391 in carriage frame 3| enables the activemovement of latch bellcrank 39|.

The operation under control of carriage return and resetting key 3H issimilar to that described above except that pawl |82 and its arm 291 areeffective with respect to slides 23d and 381 as shown in Fig. '1.

While I have shown and described a preferred embodiment of theinvention, it is to be understood that the invention is capable of bothvariation and modication from the form shown without departing from thetrue scope thereof, which should be limited only by the scope of theclaims appended hereto.

, therefore, claim as my invention:

l. In a calculating machine, a shiitable register, actuating means forsaid register, a source of power, a cyclically operable clutch betweensaid source of power and said actuating means, shifting means for saidregister having a normally disabled drive connection with said actuat- Ving means, resetting mechanism for said register having a normallydisabled drive connection with l' said actuating means, and selectivelyoperable control means cooperatively related to said shifting means andsaid resetting means for enabling said normally disabled driveconnections; said control means having controlling connections forengaging said clutch, for determining operation of said shifting meansto move said register to any selected one of a plurality ofpredetermined positions thereof, and for determining operation o saidresetting means at vthe end of the shifting operation.

2` In a Vcalculating machine, a shiitable register, shifting means forsaid register, resetting means for said register, drive means for saidshifting and resetting means including a .cycliealiy operable clutch,control means associated with said shifting means fer determiningopera.E tien thereof by said clutch lto shift, said register te one of'a plurality of predetermined pesi-V tions, and means controlled Vbysaid centrei means for determining operation of said resetting means bysaid clutch at the end of a shifting oneration.

3. In a calculating machine, a register rneunt.- ed or endivise shiftingmovement, selectively operable mechanism for shifting of said registerin either direction, resetting means for said register, a key, meanscontrolled by said Vkey for determining operation oi* said shiftmechanism to. move said register in one direction to a predeterminedposition ti-iereoi and for determining operation or said resettingmeans, a second key, means controlled by said second key for determiningoperation of said shift mechanism to more, said register in the otherdirection to a second predetermined position thereof and for deter-vmining operation of said resetting means, come man means for latchingsaid keys in depressed position, and latch releasingl means operable intimed relation to said shift mechanism te release a depressed key afterthe shitting and resetting operations.

li. In a calculating machine, a register mounted for endwise shiftingmovement, selectively operable mechanism for shifting of seid registerin eitrner direction, resetting means for said register, a key, means.controlled by said key for determining operation of said sii-iftmechanism te move said register in one direction to a predeterminedposition thereof and for determinine'v operation of said resettingmeans, a second key, means. centrolled by said second key fordetermining operation of rsai-d stuft mechanism to move. Said registerin the other direction to a second predetermined position thereof and.for cle-ter- Ini ine operation of said resetting means, eo'm.-

means, ior lzatchin-g said key-S in. depressed position, and a,pluralityV er laten releasing sie; mounted ier mevement `with saidregister and petitioned for selective cooneration with said latch meansin said predetermined positions of Seid Carriage.,

CARL M. FRIDEN.

